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    The Contour electrode array: Safety study and initial patient trials of a new perimodiolar design

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    The contour electrode array: safety study and initial patient trials of a new perimodiolar design (979.0Kb)

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    Author
    Tykocinski, M; Saunders, E; Cohen, LT; Treaba, C; Briggs, RJS; Gibson, P; Clark, GM; Cowan, RSC
    Date
    2001-01-01
    Source Title
    OTOLOGY & NEUROTOLOGY
    Publisher
    LIPPINCOTT WILLIAMS & WILKINS
    University of Melbourne Author/s
    TYKOCINSKI, MICHAEL; COHEN, LAWRENCE; Briggs, Robert; Clark, Graeme; Cowan, Robert
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Tykocinski, M., Saunders, E., Cohen, L. T., Treaba, C., Briggs, R. J. S., Gibson, P., Clark, G. M. & Cowan, R. S. C. (2001). The Contour electrode array: Safety study and initial patient trials of a new perimodiolar design. OTOLOGY & NEUROTOLOGY, 22 (1), pp.33-41. https://doi.org/10.1097/00129492-200101000-00007.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/27591
    DOI
    10.1097/00129492-200101000-00007
    Description

    This is a publisher’s version of an article published in Otology & Neurotology 2001. This version is reproduced with permission of Lippincott Wilkins & Williams.

    Abstract
    OBJECTIVE: The aim of these studies was to investigate the insertion properties and safety of a new intracochlear perimodiolar electrode array design (Contour). BACKGROUND: An electrode array positioned close to the neural elements could be expected to reduce stimulation thresholds and might potentially reduce channel interaction. METHODS: Two sequential studies were conducted. In study 1, the Contour electrode array was inserted in 12 human temporal bones. After cochlear surface preparation, the position of the array was noted and the basilar membrane was examined for insertion damage. On the basis of the outcome of this temporal bone study, study 2 investigated the Contour array, mounted on a Nucleus CI-24 M device and implanted in three adult patients. RESULTS: Study I showed that in 10 temporal bones, the Contour array was positioned close to the modiolus, and the basilar membrane was intact. In the two remaining bones, the arrays had pierced the basilar membrane and were positioned in the scala vestibuli apical to the penetration. Statistical analysis showed an equivalent probability of insertion-induced damage of the two array designs. In study 2, image analysis indicated that the Contour electrodes were positioned closer to the modiolus than the standard Nucleus straight array. Lower T and C levels, but higher impedance values, were recorded from electrodes close to the modiolus. Initial speech perception data showed that all patients gained useful open-set speech perception, two patients achieving scores of 100% on sentence material 3 months postoperatively. CONCLUSIONS: The temporal bone studies showed the Contour electrode array to be generally positioned closer to the modiolus than the standard Nucleus straight array, and to have an equivalent probability of causing insertion-induced damage.
    Keywords
    cochlear implant; contour control

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